What is the role of water in the carbon cycle?

Answer 1

• They absorb water through their roots and transport it to the leaves. Here it undergoes transpiration and is returned to the atmosphere as water vapour. Some of the water is also retained within the plant.

Answer 2

The Carbon Cycle is a complex series of processes through which all of the carbon atoms in existence rotate. The same carbon atoms in your body today have been used in countless other molecules since time began. The wood burned just a few decades ago could have produced carbon dioxide which through photosynthesis became part of a plant. When you eat that plant, the same carbon from the wood which was burnt can become part of you. The carbon cycle is the great natural recycler of carbon atoms. Unfortunately, the extent of its importance is rarely stressed enough. Without the proper functioning of the carbon cycle, every aspect of life could be changed dramatically...

The carbon cycle is the bio-geochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth. Other bodies may have carbon cycles, but little is known about them. All of these components are reservoirs of carbon. The cycle is usually thought of as four main reservoirs of carbon interconnected by pathways of exchange. The reservoirs are the atmosphere, terrestrial biosphere (usually includes freshwater systems), oceans, and sediments (includes fossil fuels). The annual movements of carbon, the carbon exchanges between reservoirs, occur because of various chemical, physical, geological, and biological processes. The ocean contains the largest pool of carbon near the surface of the Earth, but most of that pool is not involved with rapid exchange with the atmosphere.

So you cannot point to a specific (bio)chemical reaction where carbon and water are involved and say "that's the role of water in the carbon cycle". Carbon makes numerous compounds with hydrogen and oxygen which originate from water.

Calvin cycle, on the other hand, is the process of carbon fixation and reduction in plants. Here NADPH + H+ is used, and these hydrogens originate from water splitting during the light phase of photosynthesis (whereas the oxygen is released).

Answer 3

It creates a gas chamber of selected gases in allowing the carbon cycle to continue with the carbon dioxide intake.